Review input parameters check

[franck-simon]

Revision of input parameters checks, more checks with warnings and few critical errors. Remaining critical errors: On data:

• The input data is required.
• The input data must be a dataframe.
• The input data is empty.
• The input data has no variable.
• The input data contains only NAs On state order:
• All variables have been defined as contextual in the state_order. No network can be infered with these settings.
• All variables have been defined as consequences in the state_order. No network can be infered with these settings.

Changes on some defaults: latent = "oriention" and propagation=FALSE now

Parameters, state_order and if provided, true edges and black box, after being intialized by default or checked/corrected, are returned in the MIIC ouput.

[louise-rb-dupuis]

As discussed, I'm only testing this branch and we will review code later. On input data all critical errors were rightfully triggered (but I didn't know how to obtain "no variable" though). On state_order all critical errors were rghtfully triggered. Test of black_box and true_edges ok.

Parameters, state_order and if provided, true edges and black box, after being intialized by default or checked/corrected, are returned in the MIIC ouput OK